With the development of wind power technology in the direction of "high power and high tower", assembled steel-concrete hybrid tower (hybrid tower) has become the mainstream of the industry because of its economic benefits and adaptability advantages. However, the wind-resistant and seismic safety of the mixed tower still faces severe challenges. This study focuses on the dynamic response mechanism of wind-earthquake coupling effect of mixed tower and the optimization of numerical simulation algorithm. The complex modal analysis method is used to establish the dynamic response equation under wind-earthquake coupling, and the relationship between stress amplification coefficient and coupling frequency is established through regression analysis, so as to quantitatively evaluate the coupling risk of mixed tower connection. The improved particle swarm optimization (PSO) and Kriging proxy model are combined, and the Pareto optimal solution set is generated with the mixed tower cost, top displacement and stress concentration coefficient as multi-objectives to realize the multi-objective optimal design of the mixed tower structure. The effectiveness of the theoretical model and optimization algorithm is verified by taking a hybrid tower wind power project under construction in North China as an example. The results show that the optimized scheme is superior to the original scheme in reducing cost, tower top displacement and stress concentration coefficient, which provides a scientific basis for the design optimization of mixed tower structure.
Chen et al. (Sun,) studied this question.